<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Drag feedback for partly visible float: negative margins</title>
<style type="text/css">
p
	{margin-top:0;}
div
	{float:left;
	margin:-150px 0 0 -150px;
	height:200px;
	width:200px;
	background-color:navy;}
</style>
</head>
<body>
<div draggable="true" ondragstart="event.dataTransfer.effectAllowed = 'copy'"/>
<p>Try to drag blue box above. Feedback overlay should be square.</p>
</body>
</html>